依据近年来我国南北地震带部分地区强震、大震与华北地区中等地震活动的某些相关性特征,结合华北地区地震活动演化特点,以及对异常信度较高的区域异常项目对比与分析,山东地震台测震学与综合预报学科对研究区近期发生的一次中等地震,即2022年10月30日渤海海域ML 4.1地震作出预测,并指出:近年来南北地震带中南段中部大震发生前后,华北地区中等以上地震多出现长时间平静现象,且平静打破后,其后续ML 4地震分布也有一定规律可循;莱州湾及附近海域存在小震调制比高值异常;渤海海域及附近部分地区ML 3地震较活跃,同时,ML 3地震能量释放呈逐渐增强态势。希望通过对2022年渤海海域ML 4.1地震预测过程的分析与总结,为今后地震研究相关工作提供借鉴。
Based on the analysis of some correlation characteristics between strong earthquakes and large earthquakes in some regions of the North-South Seismic Belt in China in recent years and moderate seismic activity in North China and based on the characteristics of seismicity evolution in North China and the comparison and analysis of regional anomalies with high anomaly confidence, the seismology and comprehensive prediction department of the Shandong Seismic Station predicted a moderate earthquake that occurred recently in the study area, i.e., the ML 4.1 earthquake in the Bohai Sea area on October 30, 2022. It is pointed out that, before and after the occurrence of major earthquakes in the central southern section of the North-South Seismic Belt in recent years, there has been a long-term quiescence in earthquakes of medium or above in North China, and after the quiescence is broken, the distribution of subsequent ML 4 earthquakes also has certain rules to follow. There is a high-value anomaly of a small earthquake modulation ratio in Laizhou Bay and surrounding waters; ML 3 earthquakes are relatively active in the Bohai Sea and some nearby areas and the energy release of ML 3 earthquakes is gradually increasing. It hopes that the summary and analysis of the earthquake prediction process of the 2022 Bohai Sea ML 4.1 will provide a reference for future earthquake research-related work.
2023,44(2): 11-17 收稿日期:2023-3-7
DOI:10.3969/j.issn.1003-3246.2023.02.002
作者简介:冀东普(1973—),男,山东菏泽人,硕士,高级工程师,主要从事地震预报与研究工作。E-mail:jidongpu2022@163.com
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